| Base on the theoretic of both the P-wave displacement equation of spherical-source and the relation between the amplitude and frequency of the wavelet and charge. The quantitative relation of both the P-wave particle displacement proportion to charge and the root mean square of amplitude proportion to the 3/2 root of cavity radius was obtained, then the elongated charge , and the vertical delay stacked source, and the concentrating energy source, and the detonating seismic hammer,and opposite collision source were developed.Using the directional characteristic of the positive direction explodes elongated charge, wavefront of the elongated charge in the explode location shown higher directivity is in-phase stacked, and also propitious for P-wave to explode and travel.The vertical delay stacked source obtains optimum matching with wall rock by controlling the charge mode and the excitation velocity, and maximum utilizes its energy. Thus the seismic signal with the high frequency abundance and frequency bandwidth wide be obtained.The concentrating energy source focuses the energy down and reduces percussion for the ground by using the theory of directional charge. The seismic wave madding by the detonating seismic hammer have higher frequency and remedy the disadvantage of the lower energy utilization of the concentrating energy source.The opposite collision source improve the energy of the source and obtain the seismic wave having high energy by using the dynamite explode the two poles at the same time . These five sources comfit for different the surface and geologic task, and have good effect. |
